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Table 2 Prevalence of asthma and respiratory symptoms among adults ≥18 years, Karachi, Pakistan, 2015 (n = 1629)

From: Epidemiology of asthma and associated factors in an urban Pakistani population: adult asthma study-Karachi

Outcome variables n (%) 95% CI
Self-reported asthmaa 29 (1.8) 1.0–2.6
Reversibility ≥200 ml in FEV1b d 105 (11.3) 9.4–13.3
Respiratory symptoms and reversibility ≥200 ml in FEV1C d 61 (6.6) 5.1–8.1
SOB grade I 410 (25.2) 22.5–27.9
SOB grade II 359 (22.0) 19.5–24.6
Acute cough 72 (4.4) 3.1–5.7
Chronic cough 49 (3.0) 1.9–4.1
Acute wheeze 164 (10.1) 8.2–11.9
Chronic wheeze 130 (8.0) 6.3–9.7
Acute phlegm 107 (6.6) 5.1–8.1
Chronic phlegm 60 (3.7) 2.5–4.9
  1. dSample size: 930 participants
  2. SOB Shortness of breath
  3. aSelf-reported, physician-diagnosed asthma
  4. bSpirometry-based asthma assessed on presence of post-bronchodilator reversibility ≥200 ml in FEV1
  5. cAsthma based on post-bronchodilator reversibility ≥200 ml in FEV1 and one or more respiratory symptoms, or self-reported asthma